Earlier this year, the team at Harmonic Financial Planning conducted an unusual site visit in Iceland, standing on volcanic rock beside the massive industrial fans of the Mammoth plant. Located in the Hellisheiði Energy Park and operated by Swiss cleantech company Climeworks, Mammoth is currently the world’s largest Direct Air Capture and Storage facility. Its purpose is to remove carbon dioxide directly from the atmosphere, a technology often described as one of the most ambitious “moonshot” solutions in the fight against climate change.
The visit highlighted a striking contrast in the climate conversation. On one side is the world of technological innovation, where engineers and scientists are developing advanced solutions such as carbon capture systems. On the other side lies the reality of climate politics and financial markets, which often move at a different pace. While the Mammoth plant demonstrates the remarkable potential of human ingenuity, it also reveals the economic challenges associated with scaling such technologies.
One of the key issues shaping the climate investment landscape is the growing accountability gap in corporate climate commitments. Many companies have announced ambitious net-zero goals in recent years, gaining attention and positive publicity. However, follow-through on these promises has been inconsistent. A study conducted by Harvard Business School examined more than 1,000 companies worldwide that set emissions reduction targets for 2020. The research found that nearly one-third of those companies never publicly disclosed whether they had achieved their goals. Among the companies that did report their progress, dozens failed to meet their targets, yet only a small number openly acknowledged the shortfall.
This lack of transparency makes it difficult for investors and the public to distinguish between companies that are genuinely advancing climate solutions and those that may be engaging in greenwashing. Unlike financial reporting, where strict accountability mechanisms exist, climate reporting standards are still evolving. Despite these challenges, the broader commitment to the energy transition within the private sector remains strong.
Another emerging trend in corporate sustainability is “greenhushing,” where companies continue working toward climate goals but choose to speak less publicly about their progress. In an increasingly politicized environment, some businesses prefer to focus on implementation rather than public messaging. Major technology companies, including Microsoft, which is one of the largest corporate supporters of Climeworks, are continuing to invest heavily in renewable energy and climate technologies. These companies require reliable and clean energy to support rapidly expanding data infrastructure, particularly as artificial intelligence continues to grow.
For investors, the shifting landscape of climate finance has also been reflected in market performance. Renewable energy investments experienced a dramatic boom between 2017 and early 2021, fueled by optimism surrounding the global energy transition. During this period, funds such as the iShares Global Clean Energy ETF delivered extraordinary returns exceeding 200 percent. However, this period of rapid growth was followed by a downturn between 2021 and 2024 as inflation rose, interest rates increased, and capital-intensive renewable projects faced higher financing costs.
By late 2024 and into early 2026, market sentiment began to stabilize again, suggesting a potential turning point for clean energy investments. Some funds focused on installed renewable infrastructure, including wind farms, solar power installations, and battery storage, have demonstrated greater stability compared to more speculative technology investments. These infrastructure-focused funds generate income from operational assets, making them less volatile and providing steady returns even during market turbulence.
The Mammoth facility itself illustrates both the promise and the scale of the challenge facing carbon removal technologies. The plant is designed to capture up to 36,000 tonnes of carbon dioxide per year once fully operational. While this represents a significant technological achievement and is nearly ten times larger than its predecessor, Orca, the numbers remain small compared with global emissions. Humanity currently releases approximately 40 billion tonnes of carbon dioxide annually, highlighting the enormous gap between current removal capacity and what would be needed to make a meaningful impact.
Climeworks sells the carbon removal credits generated by Mammoth for roughly 1,000 US dollars per tonne. These credits are considered among the highest quality in the carbon market because they represent verified removal rather than avoided emissions. Instead of traditional industrial polluters purchasing these credits, the buyers are primarily technology companies such as Microsoft, Google, Stripe, and Shopify. These firms are willing to pay premium prices in order to secure future access to reliable carbon removal capacity and support the development of the technology.
However, the global voluntary carbon market currently purchases less than one million tonnes of permanent carbon removal each year. According to the Intergovernmental Panel on Climate Change, the world may need between five and ten billion tonnes of carbon removal annually by 2050 to meet climate targets. This enormous gap indicates that voluntary corporate action alone will not be enough, and stronger policy frameworks will likely be required.
One policy proposal gaining attention is the idea of a Carbon Takeback Obligation. Under this model, fossil fuel producers would be required to permanently store or remove a portion of the carbon dioxide generated by the fuels they sell. Advocates argue that such policies could create a stable market for carbon removal technologies and help scale solutions like direct air capture.
Beyond carbon capture, experts emphasize that climate solutions must involve a combination of approaches rather than relying on a single technology. Renewable energy continues to expand rapidly around the world, with solar, wind, and hydropower installations increasing every year. Carbon capture technologies remain important for industries that are difficult to decarbonize, such as cement production and aviation. Meanwhile, nature-based solutions including reforestation, wetland restoration, and soil carbon management can provide large-scale carbon absorption at relatively low cost when supported by effective governance.
Despite ongoing progress, climate policy challenges remain significant. Political developments, including shifts in international climate agreements and national policies, have slowed momentum in some areas. Current projections suggest that global temperatures could rise by two to three degrees Celsius in the coming decades if stronger mitigation measures are not implemented.
As a result, attention is increasingly turning toward climate adaptation alongside mitigation. Adaptation focuses on preparing societies for the impacts of climate change through investments in resilient infrastructure, water management systems, agricultural technologies, and other solutions designed to protect communities and economies from environmental disruptions.
For investors, this shift creates new opportunities. While mitigation technologies aim to reduce emissions, adaptation investments focus on strengthening resilience in a warming world. Both areas are expected to attract significant capital in the coming decades as governments, businesses, and financial institutions seek practical ways to address climate risks.
The broader lesson from the Mammoth plant and the evolving climate investment landscape is that the energy transition is rarely a straight path. Markets move through cycles of optimism, setbacks, and gradual progress. Periods of financial stress often eliminate weaker business models while highlighting the companies and technologies that can deliver real results.
Ultimately, the future of climate solutions will depend on the combination of innovation, supportive policy frameworks, and long-term investment strategies. The Mammoth plant represents an important technological milestone, but it also serves as a reminder that without sustained investment and effective policy support, even the most advanced engineering breakthroughs may remain limited in scale.
